Early-est:     Kamchatka Peninsula, Russia    2026.10.09-17:09:57.17    q:C      mb:4.5    Mwp:-    Mwpd:-    Td*T50Ex:-     fmamp_polarity:     hash:     fmamp_amp_aref:     fmamp_amp_mwp:

Automatic solution - this event has not been reviewed by a seismologist
Automatically determined event information may be incorrect!

Earthquake Details: Magnitude: mb: 4.5 [34]    Mwp: - [0]    Mwpd: - [0] Region: Kamchatka Peninsula, Russia Origin Time: 2026.10.09-17:09:57.17 UTC Hypocenter: lat: 53.51°  lon: 156.87°  [+/-13km]    depth: 309km  [+/-22km] Location Quality: qualityCode:  C     stdErr: 1.3s   assocPhases: 64   usedPhases: 33 minDist: 16.6°   maxDist: 150.5°   AzGap: 100°   2ndAzGap: 128°   atten: -1.16 [+/-0.49] Location Uncertainty: 68%ConfEllipse:   minHorUnc: 11km   maxHorUnc: 13km   azMaxHorUnc: 56° 68%ConfEllipsoid:   semiMajorAxisLength: 24km   majorAxisAzimuth: 250°   majorAxisPlunge: 60°   semiIntermediateAxisLength: 14km   intermediateAxisAzimuth: 4°   intermediateAxisPlunge: 13°   semiMinorAxisLength: 12km Tsunamigeneic Assesment: Discriminants: Prob Underwater: <1% T50Ex: 0.4 [18]    Td: -s [0]    Td*T50Ex: - [0]    To: 2.0s [15] Closest plate boundaries:    Okhotsk / Pacific [subduction zone]: distance: ~310km    Okhotsk / North America [subduction zone]: distance: ~490km    North America / Pacific [subduction zone]: distance: ~500km Subduction geometry:    Zone: Kamchatka/Kurils/Japan    Slab depth at epicenter: 210km Decision table (TEST!): Event type: Subduction Zone Other Thrust/Normal Strike-slip Compatible close plate boundary?:  YES (310km)  no  no Prob underwater:  <1%  <1%  <1% Td*T50Ex:    -    -    - Td*To:      -      -      - Mwp magnitude:        -        -        - Hypocenter depth:        309km        309km        309km Slab depth at epicenter:        210km        -        -

First-motion Focal Mechanism (FMAMP_POLARITY):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 125°   dip: 16°   rake: -38° Nodal Plane 2: strike: 252°   dip: 81°   rake: -102° Quality: azimuthalGap: -1°   stationPolarityCount: 37   misfitWeightCount: 6.6   misfit: 0.16   stationDistributionRatio: 0.50   meanDistP: 43.6   meanDistT: 28.3   qualityCode: D Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_polarity
First-motion Focal Mechanism (HASH):    (Warning: VERY UNRELIABLE SOLUTION, qualityCode=D) Nodal Plane 1: strike: 289°   dip: 52°   rake: -68° Nodal Plane 2: strike: 76°   dip: 43°   rake: -115° Quality: azimuthalGap: 118°   stationPolarityCount: 37   misfit: 0.21   stationDistributionRatio: 0.67   rmsAngDiffAccPref: 49.13   fracAcc30degPref: 0.28   qualityCode: D Method: methodID: smi:gov.usgs/focalmec/HASH_1.2
First-motion Focal Mechanism (FMAMP_AMP_AREF):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: 0° Nodal Plane 2: strike: 270°   dip: 90°   rake: 90° Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_aref
First-motion Focal Mechanism (FMAMP_AMP_MWP):    (No solution available) Nodal Plane 1: strike: 0°   dip: 0°   rake: 0° Nodal Plane 2: strike: 270°   dip: 90°   rake: 90° Quality: azimuthalGap: -1°   stationPolarityCount: 0   misfitWeightCount: -1.0   misfit: -1.00   stationDistributionRatio: -1.00   meanDistP: -1.0   meanDistT: -1.0   qualityCode: X Method: methodID: smi:net.alomax/focalmec/fmamp_0.0.5X_2016.06.14/_amp_mwp

Event ID: smi:KOERI/ee/event/1791565797166
Event info last updated: 2026.10.09-18:10:10 UTC
Event first association/location: 2026.10.09-17:45:46 UTC
Software: Early-est 1.2.0 (2016.06.27)
Agency: KOERI